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eagles_dare13
Obsidian | Level 7

I have:

proc sql;

select COL1, count(distinct COL2 ) as cnt from TBL group by COL1;

quit;

If TBL contains:

col1  col2

A    

A     XX

Then my output says:

col1  cnt

A     1

But the cnt should be 2. Why is it neglecting the null value?

1 ACCEPTED SOLUTION

Accepted Solutions
Ksharp
Super User

set a value to missing value if you need it.

data TBL;
input col1 $  col2 $;
cards;
A    .
A     XX
;
run;

proc sql;
select COL1, count(distinct  coalescec(COL2,'......' )) as cnt from TBL group by COL1;
select COL1, (count(distinct COL2)+(sum(missing(col2)) ne 0)) as cnt from TBL group by COL1;

quit;


Xia Keshan

Message was edited by: xia keshan

View solution in original post

4 REPLIES 4
slchen
Lapis Lazuli | Level 10

Count function in proc sql only count nonmissing value of column.

stat_sas
Ammonite | Level 13

This will include null value also

proc sql;

select col1,count(*) from have

group by col1;

quit;

slchen
Lapis Lazuli | Level 10

Here count function count row number of dataset.

Ksharp
Super User

set a value to missing value if you need it.

data TBL;
input col1 $  col2 $;
cards;
A    .
A     XX
;
run;

proc sql;
select COL1, count(distinct  coalescec(COL2,'......' )) as cnt from TBL group by COL1;
select COL1, (count(distinct COL2)+(sum(missing(col2)) ne 0)) as cnt from TBL group by COL1;

quit;


Xia Keshan

Message was edited by: xia keshan

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